shadowsocks/local.py

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#!/usr/bin/env python
# Copyright (c) 2012 clowwindy
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
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from __future__ import with_statement
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import sys
try:
import gevent, gevent.monkey
gevent.monkey.patch_all(dns=gevent.version_info[0]>=1)
except ImportError:
gevent = None
print >>sys.stderr, 'warning: gevent not found, using threading instead'
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import socket
import select
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import SocketServer
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import struct
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import string
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import hashlib
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import os
import logging
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import getopt
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def get_table(key):
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m = hashlib.md5()
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m.update(key)
s = m.digest()
(a, b) = struct.unpack('<QQ', s)
table = [c for c in string.maketrans('', '')]
for i in xrange(1, 1024):
table.sort(lambda x, y: int(a % (ord(x) + i) - a % (ord(y) + i)))
return table
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def send_all(sock, data):
bytes_sent = 0
while True:
r = sock.send(data[bytes_sent:])
if r < 0:
return r
bytes_sent += r
if bytes_sent == len(data):
return bytes_sent
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class ThreadingTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
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allow_reuse_address = True
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class Socks5Server(SocketServer.StreamRequestHandler):
def handle_tcp(self, sock, remote):
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try:
fdset = [sock, remote]
while True:
r, w, e = select.select(fdset, [], [])
if sock in r:
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data = sock.recv(4096)
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if len(data) <= 0:
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break
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result = send_all(remote, self.encrypt(data))
if result < len(data):
raise Exception('failed to send all data')
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if remote in r:
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data = remote.recv(4096)
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if len(data) <= 0:
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break
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result = send_all(sock, self.decrypt(data))
if result < len(data):
raise Exception('failed to send all data')
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finally:
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sock.close()
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remote.close()
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def encrypt(self, data):
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return data.translate(encrypt_table)
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def decrypt(self, data):
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return data.translate(decrypt_table)
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def send_encrypt(self, sock, data):
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sock.send(self.encrypt(data))
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def handle(self):
try:
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sock = self.connection
sock.recv(262)
sock.send("\x05\x00")
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data = self.rfile.read(4) or '\x00' * 4
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mode = ord(data[1])
if mode != 1:
logging.warn('mode != 1')
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return
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addrtype = ord(data[3])
addr_to_send = data[3]
if addrtype == 1:
addr_ip = self.rfile.read(4)
addr = socket.inet_ntoa(addr_ip)
addr_to_send += addr_ip
elif addrtype == 3:
addr_len = self.rfile.read(1)
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addr = self.rfile.read(ord(addr_len))
addr_to_send += addr_len + addr
else:
logging.warn('addr_type not support')
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# not support
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return
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addr_port = self.rfile.read(2)
addr_to_send += addr_port
port = struct.unpack('>H', addr_port)
try:
reply = "\x05\x00\x00\x01"
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reply += socket.inet_aton('0.0.0.0') + struct.pack(">H", 2222)
self.wfile.write(reply)
# reply immediately
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if '-6' in sys.argv[1:]:
remote = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
else:
remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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remote.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
remote.connect((SERVER, REMOTE_PORT))
self.send_encrypt(remote, addr_to_send)
logging.info('connecting %s:%d' % (addr, port[0]))
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except socket.error, e:
logging.warn(e)
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return
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self.handle_tcp(sock, remote)
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except socket.error, e:
logging.warn(e)
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if __name__ == '__main__':
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print "Python Version: %s " % '.'.join(str(v) for v in sys.version_info)
if sys.version_info < (2, 6):
import simplejson as json
else:
import json
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os.chdir(os.path.dirname(__file__) or '.')
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print 'shadowsocks v0.9.4'
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with open('config.json', 'rb') as f:
config = json.load(f)
SERVER = config['server']
REMOTE_PORT = config['server_port']
PORT = config['local_port']
KEY = config['password']
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optlist, args = getopt.getopt(sys.argv[1:], 's:p:k:l:')
for key, value in optlist:
if key == '-p':
REMOTE_PORT = int(value)
elif key == '-k':
KEY = value
elif key == '-l':
PORT = int(value)
elif key == '-s':
SERVER = value
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(levelname)-8s %(message)s',
datefmt='%Y-%m-%d %H:%M:%S', filemode='a+')
encrypt_table = ''.join(get_table(KEY))
decrypt_table = string.maketrans(encrypt_table, string.maketrans('', ''))
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try:
server = ThreadingTCPServer(('', PORT), Socks5Server)
logging.info("starting server at port %d ..." % PORT)
server.serve_forever()
except socket.error, e:
logging.error(e)
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